1. Preheat your oven to 350°F (175°C).

2. In a large bowl, combine the ground beef, almond flour, egg, garlic powder, onion powder, salt, and pepper. Mix well until all ingredients are thoroughly incorporated.

3. Form the mixture into 4 equal-sized patties.

4. Heat olive oil in a large skillet over medium heat. Add the patties and cook until each side is nicely browned, about 4 minutes per side. Remove the patties and set aside.

5. In the same skillet, add the sliced onions and mushrooms, and sauté until they are soft and golden, about 5 minutes.

6. Place the patties back in the skillet with the onions and mushrooms. Pour the beef broth, heavy cream, and Worcestershire sauce over the top.

7. Sprinkle the shredded cheese evenly over the patties and vegetables.

8. Transfer the skillet to the preheated oven and bake for 20 minutes, or until the cheese is bubbly and golden brown.

9. Remove from oven and let it rest for a few minutes before serving.